<?php
/**
 * @package php-font-lib
 * @link    https://github.com/PhenX/php-font-lib
 * @author  Fabien Ménager <fabien.menager@gmail.com>
 * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
 */

namespace isszz\captcha\font\lib;

/**
 * Encoding map used to map a code point to a Unicode char.
 *
 * @package php-font-lib
 */
class EncodingMap
{
	
	private $f;
	
	public function __construct($file)
	{
		$this->f = fopen($file, 'r');
	}

	public function parse()
	{
		$map = [];

		while ($line = fgets($this->f)) {
			if (preg_match('/^[\!\=]([0-9A-F]{2,})\s+U\+([0-9A-F]{2})([0-9A-F]{2})\s+([^\s]+)/', $line, $matches)) {
				$unicode = (hexdec($matches[2]) << 8) + hexdec($matches[3]);
				$map[hexdec($matches[1])] = array($unicode, $matches[4]);
			}
		}

		ksort($map);

		return $map;
	}
}
